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Now showing items 1-20 of 60
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An anatomical and experimental study on changes induced by Meloidogyne hapla Chitwood, 1949 in Vitis roots
(Stellenbosch : Stellenbosch University, 1971)ENGLISH ABSTRACT: The object of this anatomical study was to collect scientific data on the effect of Metoidogyne hapta Chitwood, 1949, on the roots of the following grapevine cultivars viz: Vitis vinifePa L. cvs. Steen ... -
Aspects of sucrose metabolism in transgenic tobacco
(Stellenbosch : Stellenbosch University, 2004-12)ENGLISH ABSTRACT: In most plants the efficiency of sucrose production and the systemic distribution thereof are the major determinants of growth, development and yield. The factors governing sugar partitioning co-ordinate ... -
Berry tannin structure and phenolics evolution in cv. Cabernet Sauvignon (Vitis vinifera L.) : effect of light and temperature
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: This study investigated grape flavonoid (proanthocyandins, flavonols and anthocyanins) accumulation and composition in grape seeds and skins from Cabernet Sauvignon (Vitis vinifera L.) under altered ... -
Bydrae tot die kennis omtrent die fisiologie, morfologie en sistematiek van die Apiculatus giste
(Stellenbosch : Stellenbosch University, 1932)No Abstract Available -
Characterising sensory interactions between volatile phenols and other taint-causing compounds in South African red wines
(Stellenbosch : Stellenbosch University, 2019-04)ENGLISH ABSTRACT: South African red wine competes for limited market space, and must maintain consistent, excellent quality. One of the important modalities in assessing the quality and typicality of wine is odour ... -
Characterization and evaluation of glucose oxidase activity in recombinant Saccharomyces cerevisiae strains
(Stellenbosch : Stellenbosch University, 2010-03)ENGLISH ABSTRACT: Popular wine styles prepared from fully-ripened, more mature grapes are characterized by intense fruitiness and varietal flavors. However, lengthy maturation of grapes in the vineyard does not only ... -
Characterization of melatonin production and physiological functions in yeast
(Stellenbosch : Stellenbosch University, 2020-03)ENGLISH ABSTRACT: Melatonin is a molecule that is found in all living organisms with numerous functions such as the regulation of circadian rhythms in animals and growth stimulation in plants. Studies suggest that melatonin ... -
Characterization of transgenic grapevine ectopically expressing plant defensin peptides
(Stellenbosch : Stellenbosch University, 2019-12)ENGLISH ABSTRACT: Grapevine (Vitis vinifera L.) is one of the most important and widely grown food crops in the world. The cultivation and commercial production of this crop has, however, became highly dependent on the use ... -
The colour and phenolic content of Robertson Red grape cultivars : distribution, correlation with wines and analyses
(Stellenbosch : Stellenbosch University, 2013-03)ENGLISH ABSTRACT: South African red wine is often acknowledged world wide as being full bodied and deep in colour. This is often the result of high temperatures that is experienced during the important growth stages of ... -
Comparative 'omic' profiling of industrial wine yeast strains
(Stellenbosch : Stellenbosch University, 2009-12)The main goal of this project was to elucidate the underlying genetic factors responsible for the different fermentation phenotypes and physiological adaptations of industrial wine yeast strains. To address this problem ... -
Consumer attitudes and sensory perceptions of wine : a South African cross-cultural study
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: The wine consumer landscape has changed in South Africa since 1994. Historically, some population groups had more access and greater cultural affinity for the product “wine”, but such historical patterns ... -
The control of cellular adhesion of Saccharomyces cerevisiae by the FLO gene regulator Mss11p
(Stellenbosch : University of Stellenbosch, 2010-03)ENGLISH ABSTRACT: The yeast Saccharomyces cerevisiae senses change within its environment and responds through specific adaptive cellular programmes, in particular by modifying gene expression. Many adaptive changes ... -
Cross species identification of genetic factors that determine fruit surface characteristics
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: The plant cuticle is a typically waxy layer that covers the entire above ground part of higher plants and performs a number of important roles in vegetative organs and during fruit development and ripening, ... -
The development of yeasts for the optimal production of flavor-active esters and higher alcohols in wine and distillates
(Stellenbosch : Stellenbosch University, 2004-12)ENGLISH ABSTRACT: Yeasts produce a broad range of aroma-active volatile esters and higher alcohols during alcoholic fermentation. Some of these esters and higher alcohols are important for the fruity flavors and therefore ... -
Directed evolution of wine-related lactic acid bacteria and characterisation of evolved strains
(Stellenbosch : Stellenbosch University, 2020-03)ENGLISH ABSTRACT: Microorganisms form part of complex ecological networks, governed by either metabolic, physical or molecular processes that have positive, neutral or negative effects on microbial interactions. Understanding ... -
The effect of enzymatic processing on banana juice and wine
(Stellenbosch : Stellenbosch University, 2008-12)Although bananas are widely grown worldwide in many tropical and a few subtropical countries, banana beverages are still among the fruit beverages processed by use of rudimentary methods such as the use of feet or/and ... -
The effect of oxygen on the composition and microbiology of red wine
(Stellenbosch : University of Stellenbosch, 2006-03)The winemaking process involves different complex chemical and biochemical reactions, which include those of oxygen (O2). Oxygen can come into contact with the wine through various winemaking procedures and can be used ... -
Effect of varying levels of nitrogen, potassium and calcium nutrition on table grape vine physiology and berry quality
(Stellenbosch : Stellenbosch University, 2012-03)ENGLISH ABSTRACT: A lack of defects is required for successful table grape marketing, which pre-suppose optimal vine performance, berry development and post-harvest quality. The supply of mineral nutrients affects vine ... -
Elucidating the metabolic pathways responsible for higher alcohol production in Saccharomyces cerevisiae
(Stellenbosch : University of Stellenbosch, 2011-03)ENGLISH ABSTRACT: Alcoholic fermentation, and especially wine fermentation, is one of the most ancient microbiological processes utilized by man. Yeast of the species Saccharomyces cerevisiae are usually responsible for ... -
Evaluating the effect of environmental parameters on the dynamics of the wine yeast consortium
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Wine fermentation is a complex biochemical process which is characterized by the sequential development of various weakly and strongly fermentative yeast species. Thus, in such a multispecies consortium, ...
